I have 98' 24v 4x4 3.54 rear long bed with 63,000. I bought it<br>in 2000 with 36,000. I was getting 18 mpg then it reduced to <br>16.5 mpg and now I'm lucky if I get 14 mpg. Mostly drive 50/50 to work. Now sometimes on acceleration onto freeway it hesitates. The oil gets change every 5k, fuel filter every 10k and check air cleaner often. Dealership check it over and found no codes. Also, they checked the trans for shifting problems ect. I checked for air leaks, checked for fuel leaks, and tightened all clamps. I have used the same fueling station for three years. Any feedback would be appreciated. Thank you.

 

Thanks for the info. I inspected and cleaned the IAT sensor. There was very little soot. We plan to go 1 hour north of Phoenix and do some hiking. I'll check mileage.

 

Sorry for &quot;no updates&quot; but I have been trying to get the truck in the shop for fuel pressure check. Sunday we drove 285 freeway miles and barely got 15mpg at 70mph. The elevation was 1,100 to 5,500 feet and back.<br>I just want to thank every one for there input, it really does help. I am a first time diesel owner and I think Iam hook.

 

I went down the check list of items that everyone had said to try. Now it was time to check the lift pump. It took a while but I got the truck in to the dealership. They claimed they did a number of test, including the lift pump. I ask them what the psi was on the pump. They said, we don't know. Went to a different dealership. They told me I had 1 psi at idle and 0 psi at 1500 rpm. Now that I have a new lift pump the truck is faster at take off. Its like a new truck again.<br>Thanks to this web site and everyone who help. I'm happy again.